Numerical investigation of mixing in parallel jets

A system of parallel jets is widely encountered in many industrial applications. Wide spread applications necessitate the study of the basic mixing phenomenon of parallel jets. In the present study, the mixing phenomenon in the two jet flow and the three jet flow has been studied numerically by solving the Reynolds Averaged Navier Stokes equations. The results predicted by the Reynolds stress model compare well with the experimental data of axial velocity and shear stress available in literature. An attempt has been made to predict the critical mixing regions such as the merge point and the combine point by correlating them with jet spacing and jet exit conditions. A comparison between single jet, two jet and three jet systems has been carried out to evaluate the effect of presence of the second and the third jet on the mixing phenomenon and turbulent fluctuations.

► The effect of adjacent third jet on the mixing of two plane parallel jets is studied using computational fluid dynamics (CFD).
► Validation of CFD model with experimental data.
► Comparison of mixing behavior of two jet flow and three jet flow.
► Three jet systems provide more efficient mixing than single jet and two jet systems.
► Turbulent fluctuations occurring in the two jet flow are smaller as compared to the three jet flow.